ICONS atlas: AFR - Lotikipi Basin

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Overview

This page bundles the available data for the Lotikipi Basin in the Africa. The images are hyperlinks and will open up a separate window with a high resolution PDF image of the map.
The basin data is derived from a lower resolution grid which has been upsampled using GMT. This could have introduced an accuracy which is beyond the original data resolution.

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Lotikipi Basin location map
Basin name Lotikipi Basin
Region code AFR
Basin ID 7520
No. of rings 1
Basin size [km²] 21064.1
Plate location/code /
Basin cross section

The basin cross section is automatically generated using the available crustal structure data sets. Sometimes the data labels are not plotted correctly, depending on the length of the section.

The location of the profile is indicated in all maps as dashed-dotted thin black line. For the endpoints of the profile, the two points of a given polygon located farthest away from each other were computed.

Lotikipi Basin cross section
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Dynamic topography evolution for basin centroid
Lotikipi Basin dynamic topography through time

The dynamic topography history for the basin is derived by tracking the basin centroid. The paleo-location for this point is computed using the EarthByte plate kinematic framework rotating the position back in time.

The dynamic topography model is derived from the S20RTS seismic tomography model (Ritsema et al., 99) by converting seismic velocites to density anomalies using an empirical scaling factor of 0.25. The density anomalies are then advected back in time to compute mantle flow with plate motions superimposed (using the EarthByte plate rotation framework) as surface boundary conditions. The dynamic topography is then derived from the computed density distribution using a free upper boundary. For details regarding the methodology see the following papers:

  • B. Steinberger, H. Schmeling, and G. Marquart. Large-scale lithospheric stress field and topography induced by global mantle circulation. Earth Planet. Sci. Lett., 186:75-91, 2001.
    doi: 10.1016/S0012-821X(01)00229-1.
  • B. Steinberger. Effects of latent heat release at phase boundaries on flow in the Earth's mantle, phase boundary topography and dynamic topography at the Earth's surface. Phys. Earth Planet. Int., 164:2-20, 2007.
    doi: 10.1016/j.pepi.2007.04.021.

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Observations

Mantle Lid thickness
Lotikipi Basin location map
Statistics - Mantle Lid thickness
Median 47.110
Mean 47.885
Scale 4.692
stdev 4.661
Z_min/Location 38.975/4.06667°Lat 34.4°Lon
Z_max/Location 60.753/ 3.9°Lat 35.6333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Depth of 550 deg isotherm
Lotikipi Basin location map
Statistics - Depth of 550 deg isotherm
Median -28.724
Mean -29.014
Scale 0.431
stdev 0.748
Z_min/Location -31.606/2.96667°Lat 34.8667°Lon
Z_max/Location -28.000/ 4.0°Lat 35.0°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Mobil isopachs
Lotikipi Basin location map
Statistics - Mobil isopachs
Median 0.541
Mean 0.588
Scale 0.209
stdev 0.271
Z_min/Location 0.148/2.96667°Lat 34.8667°Lon
Z_max/Location 1.660/ 3.9°Lat 35.6333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Plain crustal thickness
Lotikipi Basin location map
Statistics - Plain crustal thickness
Median 38.134
Mean 38.120
Scale 3.072
stdev 2.363
Z_min/Location 33.320/4.9°Lat 35.7333°Lon
Z_max/Location 42.350/ 4.43333°Lat 34.3333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base middle crust
Lotikipi Basin location map
Statistics - Base middle crust
Median -25.896
Mean -25.882
Scale 1.847
stdev 1.440
Z_min/Location -28.511/4.43333°Lat 34.3333°Lon
Z_max/Location -23.040/ 4.9°Lat 35.7333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base lower crust
Lotikipi Basin location map
Statistics - Base lower crust
Median -37.371
Mean -37.375
Scale 2.842
stdev 2.166
Z_min/Location -41.282/4.43333°Lat 34.3333°Lon
Z_max/Location -33.038/ 4.9°Lat 35.7333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Total crustal thickness
Lotikipi Basin location map
Statistics - Total crustal thickness
Median 38.404
Mean 38.371
Scale 2.936
stdev 2.243
Z_min/Location 33.806/4.9°Lat 35.7333°Lon
Z_max/Location 42.368/ 4.23333°Lat 34.3333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base upper crust
Lotikipi Basin location map
Statistics - Base upper crust
Median -13.022
Mean -12.982
Scale 0.520
stdev 0.439
Z_min/Location -13.785/4.43333°Lat 34.3333°Lon
Z_max/Location -12.029/ 3.9°Lat 35.6333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Thermal lithospheric thickness
Lotikipi Basin location map
Statistics - Thermal lithospheric thickness
Median 85.194
Mean 86.256
Scale 2.181
stdev 3.387
Z_min/Location 81.112/4.06667°Lat 34.4°Lon
Z_max/Location 98.513/ 2.96667°Lat 34.8667°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Heatflow
Lotikipi Basin location map
Statistics - Heatflow
Median 79.911
Mean 79.822
Scale 3.676
stdev 2.948
Z_min/Location 73.921/4.13333°Lat 34.3667°Lon
Z_max/Location 85.450/ 4.2°Lat 35.6333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Topography (ETOPO2)
Lotikipi Basin location map
Statistics - Topography (ETOPO2)
Median 590.000
Mean 644.199
Scale 131.951
stdev 204.774
Z_min/Location 423.000/5.0°Lat 34.9667°Lon
Z_max/Location 1597.000/ 4.03333°Lat 34.4333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base hard sediments
Lotikipi Basin location map
Statistics - Base hard sediments
Median 0.757
Mean 0.745
Scale 0.251
stdev 0.207
Z_min/Location 0.253/5.2°Lat 35.6667°Lon
Z_max/Location 1.079/ 4.23333°Lat 34.3333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Temperature at 50km depth
Lotikipi Basin location map
Statistics - Temperature at 50km depth
Median 979.890
Mean 972.496
Scale 14.676
stdev 23.032
Z_min/Location 891.393/2.96667°Lat 34.8667°Lon
Z_max/Location 1006.710/ 4.06667°Lat 34.4°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Laske sediment thickness
Lotikipi Basin location map
Statistics - Laske sediment thickness
Median 0.052
Mean 0.052
Scale 0.037
stdev 0.031
Z_min/Location -0.007/3.03333°Lat 34.8°Lon
Z_max/Location 0.130/ 3.93333°Lat 35.6333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Lithospheric temperature gradient
Lotikipi Basin location map
Statistics - Lithospheric temperature gradient
Median 7.189
Mean 7.318
Scale 0.601
stdev 0.632
Z_min/Location 5.930/5.0°Lat 35.0°Lon
Z_max/Location 9.874/ 3.03333°Lat 34.9°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Computations

Beta (Crust)
Lotikipi Basin location map
Statistics - Beta (Crust)
Median 1.021
Mean 1.025
Scale 0.083
stdev 0.064
Z_min/Location 0.919/4.43333°Lat 34.3333°Lon
Z_max/Location 1.168/4.9°Lat 35.7333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Isostatic correction
Lotikipi Basin location map
Statistics - Isostatic correction
Median 0.022
Mean 0.022
Scale 0.016
stdev 0.013
Z_min/Location 0.000/4.63333°Lat 34.4667°Lon
Z_max/Location 0.056/3.93333°Lat 35.6333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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TTS (crust)
Lotikipi Basin location map
Statistics - TTS (crust)
Median 0.159
Mean 0.162
Scale 0.617
stdev 0.475
Z_min/Location -0.688/4.43333°Lat 34.3333°Lon
Z_max/Location 1.126/4.9°Lat 35.7333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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TTS (sediment)
Lotikipi Basin location map
Statistics - TTS (sediment)
Median -0.781
Mean -0.767
Scale 0.231
stdev 0.196
Z_min/Location -1.081/4.23333°Lat 34.3333°Lon
Z_max/Location -0.290/5.2°Lat 35.6667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Beta (Sediment)
Lotikipi Basin location map
Statistics - Beta (Sediment)
Median 0.909
Mean 0.911
Scale 0.024
stdev 0.021
Z_min/Location 0.879/4.23333°Lat 34.3333°Lon
Z_max/Location 0.964/5.2°Lat 35.6667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Differential Beta
Lotikipi Basin location map
Statistics - Differential Beta
Median -0.110
Mean -0.114
Scale 0.056
stdev 0.045
Z_min/Location -0.210/4.16667°Lat 35.6333°Lon
Z_max/Location -0.039/4.43333°Lat 34.3333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Crustal vs lithosph. extn.
Lotikipi Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.017
Mean -0.005
Scale 0.098
stdev 0.086
Z_min/Location -0.170/4.13333°Lat 34.3667°Lon
Z_max/Location 0.205/3.9°Lat 35.6333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Anomalous TTS
Lotikipi Basin location map
Statistics - Anomalous TTS
Median -0.920
Mean -0.929
Scale 0.376
stdev 0.298
Z_min/Location -1.540/4.06667°Lat 35.6333°Lon
Z_max/Location -0.380/4.43333°Lat 34.3333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Predicted elevation
Lotikipi Basin location map
Statistics - Predicted elevation
Median 1985.990
Mean 1952.790
Scale 180.007
stdev 160.924
Z_min/Location 1554.610/3.9°Lat 35.6333°Lon
Z_max/Location 2222.840/4.13333°Lat 34.3667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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This basin data is based on interpolated global grids and might contain gridding errors or wrongly interpolated data values.

Page generated 2007-09-30 21:53:47 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia